目前在某些大型生产过程控制系统中,由于工艺过程的复杂性和连续性,对于关键工艺部份,国外常采用将电子计算机同步并联运行,以便提高其可靠性的计算机双机控制方法。当一台计算机发生故障时,即将故障计算机立即撤除而换为正常的计算机继续工作。但是,对于进行高速运算中实时处理的计算机系统,因正常计算机的记忆内容时刻都在发生变化,所以,对于在修理故障计算机并再次投 Currently in some large-scale production process control system, due to the complexity and continuity of the process, for the key part of the technology, foreign countries often use the parallel operation of electronic computers in parallel in order to improve the reliability of the computer dual-computer control methods. When a computer fails, the computer is about to be immediately removed and replaced with a normal computer to continue working. However, in a computer system that performs real-time processing in high-speed computation, the memory content of a normal computer changes from moment to moment. Therefore,